Booting new virtual image with 7.7 and with EFI

Is booting a new centos virtual image (centos 7.7 host) supported with EFI
under 7.7
If so how. Last time on 7.6 it was a technology preview or something.



7.7.1908, interface bonding, and default route


I just upgraded a machine to 7.7.1908 and the default route is not being
set on boot.

CentOS 8 will be released on 24 Sep 2019

Good morning from Singapore,

CentOS 8 will be released on 24 Sep 2019, that is, in 4 days' time.

Read link below:

<a href="" title=""></a>

It says Final release slated for 24 Sep 2019.

Thank you.

The Gospel for all Targeted Individuals (TIs):

[The New York Times] Microwave Weapons Are Prime Suspect in Ills of
U.S. Embassy Workers

Link: <a href="" title=""></a>


Singaporean Mr.

Brother HL-L2360DW printing quality

I have the above printer but have not been able to resolve issues with the printing quality in CentOS 7. The test page prints fine but when I print PDF-documents, most recently using Chinese fonts, it is lacking and the pages very hard to read. The settings in the Mate Cups configuration panel are fine and set to 600 dpi, the settings in the printer menu are all OK yet it prints more like maybe 150 or even 75 dpi.

Any suggestion what might be wrong?

selinux reports

Hi all!

I keep getting reports from selinux, like below, and I have no clue
what the app is it's talking about, nor how do figure out if it should
be allowed access or not.

Anyone got any advice to offer?

It says:

The source process: /usr/sbin/xtables-multi
attempted this access: open
on this file: /run/xtables.lock

Having no clue what xtables-multi is, or why or even if it should be
able to open that file, I am at a loss:

should I take action to enable it, or not?

Thanks in advance!


CentOS 7.7 sources

Hi Guys,

Thanks for the hard work.

I noticed some minor issues with the 7.7 sources:

1. There are many SRPMs double in the os source tree. I guess that from
every item from the 7.6 CR tree there is also still the old version present


deprecations leading up to C8

Was reading the long list of things being deprecated in the RHEL 8
release notes t'other day, and saw my old friend sendmail on the list.

I've stuck by her because I've learned how she likes to be stroked to
get the best out of her, and quail at the thought of taking on a new
MTA and having to learn it all all over again.

But I guess I'm going to have to, soon or late, probably sooner than
later. :(

Can anyone point me to resources specifically for helping us ignorant
folk in converting all the arcan-ity in into something
equivalent for Postfix?

Thanks in advancce!


running init disconnects ssh session

Noticing a new behavior lately.  Logged in via sshd and ssh keys as root
to a remote system.  When changing runlevels between multi-user or
graphical the ssh session is disconnected.  It's not a big deal but
annoying if I have other tasks to do on that particular system.  I've
tried logging in as normal user, su to root and it still disconnects the
ssh session upon either an "init 3" or "systemctl isolate" command.

UEFI booting

I installed my first UEFI disk yesterday. Seemed to go fine. CentOS 7.6
I then took that disk "out" of that machine and put it another machine - it
seems to not even boot.
I put the original disk back in that machine and it boots fine.

I put the UEFI disk back in the machine I built it on and it works fine.
They are similar machines either and i3 and i7.

Shouldn't that work? Build a UEFI disk on machine A - move it to machine B?



Postfix vs. Thunderbird on Mac OS


I'm running our local school's mail server on CentOS 7, Postfix and


I did yum -y update --exclude=vulkan*; then rebooted

When I do yum check-updates I get this: (which I expect)

vulkan.x86_64 base
vulkan-filesystem.noarch base

When I do the yum -y update I get this:

Transaction check error:
file /usr/lib64/ from install of
vulkan- conflicts with file from package
file /usr/lib64/ from install of
vulkan- conflicts with file f

CentOS-announce Digest, Vol 175, Issue 1

Send CentOS-announce mailing list submissions to
<a href="mailto:centos- ... at centos dot org">centos- ... at centos dot org</a>

To subscribe or unsubscribe via the World Wide Web, visit
<a href="" title=""></a>
or, via email, send a message with subject or body 'help' to
<a href="mailto:centos-announce- ... at centos dot org">centos-announce- ... at centos dot org</a>

You can reach the person managing the list at
<a href="mailto:centos-announce- ... at centos dot org">centos-announce- ... at centos dot org</a>

When replying, please edit your Subject line so it is more specific
than "Re: Contents of CentOS-announce digest..."

Today's Topics:


1:libguestfs-1.40.2-5.el7_7.1.ppc64le required kernel-core on POWER8

I was working on upgrading some of our POWER8 ppc64le nodes and ran into
the following issue with the libguestfs package that's currently in updates:

$ yum upgrade libguestfs
Loaded plugins: fastestmirror, priorities
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package libguestfs.ppc64le 1:1.38.2-12.el7_6.2 will be updated
--> Processing Dependency: libguestfs = 1:1.38.2-12.el7_6.2 for package:
--> Processing Dependency: libguestfs = 1:1.38.2-12.el7_6.2 for package:

CentOS 7.7.1908 being available in CBS/koji

As you probably saw it, we released CentOS 7.7.1908 for all
architectures earlier today :
Just after that we regenerated the koji internal repos to use that new
release so it's now done :
<a href=";owner=koji&amp;view=flat&amp;method=createrepo&amp;order=-id" title=";owner=koji&amp;view=flat&amp;method=createrepo&amp;order=-id">;owner=koji&amp;view=flat&amp;method=...</a>

That means that all your builds for CentOS 7 will be built against
7.7.1908 content.

Please remove

This is every day this has gone way overbord with email i have a business to run this is spaming when it is emailing daily remove us from the list now.

CentOS7 sometimes don't detect NIC after reboot

I have brand new PC with this components:
CPU Intel® Pentium G5400, LGA1151
motherboard ASUS PRIME B360M-C
HDD 2x ADATA SSD 256GB XPG GAMMIX S11, PCIe Gen3x4 M.2 2280 (RAID1)
NIC Intel X550-T1 Ethernet Converged Network Adapter

I installed CentOS 7 and two NICs were detected:
eno1 (on motherboard)
enp1s0 (Intel X550-T1)

When I restart the machine sometimes enp1s0 is missing. It is not
detected during boot. It looks like NIC card is not installed / not

audit freeing multiple contexts (when running certbot)

Apologies if it's considered off-topic, but I'm not sure in what part
of the system the issue lies.

What about Mate Desktop on Centos 8?

According to Twitter:

<a href="" title=""></a>

"The next version of #CentOS is being released September 24 and will be announced in all the usual places."

I'm wondering about the status of the Mate Desktop.

Looking under M here:

<a href="" title=""></a>

I don't see anything about Mate. Which leads me to ask, what's its status then? I hope it hasn't died since that's what I use for all of my computers.

reconfigure centos-6.9 host to ignore missing nic

I need to work on a host which has been offline and powered down for
some time. I has CentOS-6.9 installed. At some point it had two
nics, one on the motherboard (still present and working) and one as an
expansion card.

When booted the console displays:

pciehp 0000:00:1c:0:pcie04: Failed to check link status


How do I tell the host to ignore the missing nic or remove it from the
system configuration so that the error is removed.

unexpected failure emails from centos container pipeline and maintenance window

There have been few unexpected failure emails today from centos
community container pipeline, due to pods failing to run the builds in
the cluster.
Please ignore today's failure emails we are working to get things
We would also need to update the nodes, so will take some
maintenance window this week (we will keep a separate thread posting for

We are sorry for the inconvenience caused.

Note: There is no affect on the availability of
(build logs will not be available for sometime).

Thanks and Regards
Bama Charan Kundu

centos-7.7 or centos-cr brakages building python3 packages with EPEL enabled

I've started testing with the "cr" repositorory enabled, and we are
going to have a *lot* of problems building EPEL packages unless we get
well ahead of the game.

RHEl has elected to publish their python3 modules as "python3-module",
and to obsolete "python36-module" names. All well and good, this will
help provide upgrade paths from EPEL. The problem is that they've also
updated "pythone_pkgversion" to be "3", instead of "36".

How to disable i915 module

I am setting up CentOS 7 on my new firewall. This will run as a head-
less system, accessed via a serial console when necessary. It's only a
2GB system, so I don't see any reason to have the GPU consuming any of
the RAM.

I've blacklisted the i915, drm, and drm_kms_helper modules and rebuilt
the initramfs, but the i915 module is still being loaded.

Anyone know what might be loading the module and how I can stop it?


RPMDB problem

When doing yum operations I get this message at the end of whatever
yum was doing:

** Found 1 pre-existing rpmdb problem(s), 'yum check' output follows:
brscan4-0.4.8-1.x86_64 is a duplicate with brscan4-0.4.3-1.x86_64

It is true, if I do "rpm -qa | grep brscan" it shows two of them.

what's the best/proper way to deal with this?
-remove both, reinstall one?
-remove one? which one? I don't see a feature in rpm (or yum) for
removing a single one of duplicate packages. How?

Thanks in advance!


conflicts in updating to CR repo

Note, first of all I haven't actually updated, I'm just running "yum update"
to see what conflicts, if any, I get so I can be prepared when the final
7.7 release happens.

I've traditionally used the nvidia packages from elrepo, but recently
enabled rpmfusion (back when I started using 7.x, I disabled rpmfusion
because it took them a looooong time to get a EL7 repository up).

I use the priority plugin in yum, and have elrepo at priority 50
and rpmfusion at priority 60, so the elrepo nvidia packages
should "win", but yum seems to be confused about which packages
to use.

So now when doing yum

File server as host for a Windows Server VM?

I hope that someone here can give some advice on the following:

I have a Samba based Active Directory. A CentOS 7.6 machine runs as a
file server and hosts the Windows user profiles for all the Windows

Now management has decided that they need a Windows server for a couple
of administrative applications, which need MS SQL Server. That would be
the only role of this Windows.

Request to publish python-boto3 and python-s3transfer

Hello all,

Recently our containers build job started failing to build gnocchi-*
containers [0] due to missing python-boto3 [1]. After a discussion with
avij, we found that this package also requires python-s3transfer [2].
Both of these are noarch packages can be found for x86_64 and aarch64 in
the base repo [3][4]. Can these be published for ppc64le to restore our
container builds?

Opinions on using CR repository in production environments.

I was wondering what people's opinions are on running the CR repository on
production systems? I'm currently predisposed to not do it since it
indicates it hasn't fully gone through QA yet. But from my understanding
except for the alt-arch systems these are just recompiles of the redhat
RPMs after debranding right?

I'm Curious how other people are treating this repository since, from the
sounds of it, rpms are going to be in holding here between releases.

So would you treat it as a production repository or for testing only?

why windows 10 can't access centos samba


I can access centos's samba via windows 7, but fail via windows 10. Why?




Need to update gcc to version >=6 on CentOS 7 ?

I need to build u-boot on my CentOS 7 machine but encounter this:

I've updated the installation on my machine but the current version is:
How do I go about updating gcc to version 6 or greater on my CentOS 7
machine? And do so safely?

Increase logging verbosity of saslauthd?


CentOS 7.X, sendmail.x86_64 8.14.7-5.el7, cyrus-sasl.x86_64 2.1.26-23.el7

There are conflicting message on how to increase the logging of saslauthd.

I know I can do this:
/usr/sbin/saslauthd -d -n0 -m /var/run/saslauthd -a pam

but that requires a terminal as saslauthd logs the output to STDOUT, this is not what I want.

I would like to have it started as a daemon and verbosity of logging increased into a log file.

How can I increase the verbosity of logging for saslauthd?


CentOS 8/7.7

What's the hold up on both of these? Are we back to the old days?

<a href="" title=""></a>

The whole point of setting the update page at
<a href="" title=""></a> was so people didn't constantly
ask about release dates. Redirecting queries there is completely fair if
someone updates the damn thing.

Issue with python-urllib3 update in CentOS 7 CR.

So, updated to CR yesterday evening, and for the most part things are
ok.  However:

[lowen@dhcp-pool101 ~]$ sudo yum --enablerepo=cr update
Resolving Dependencies
--> Running transaction check
---> Package python-urllib3.noarch 0:1.10.2-5.el7 will be updated
---> Package python-urllib3.noarch 0:1.10.2-7.el7 will be an update
--> Finished Dependency Resolution

Dependencies Resolved

 Package                Arch           Version Repository  Size

llvm-toolset-7.0 availability

Redhat has had llvm-toolset-7.0 available since March 2019. It adds
support for clang and llvm version 7. See
<a href="" title=""></a> ... rust-1-31/

Is this going to be available on Centos 7 and if so, when?

Don't confuse this with llvm-toolset-7 which supports the older clang
version 5 which is already available with Centos 7.

oval support for centos

We use oval to check the system vulnerability.

Redhat offer official oval(<a href="" title=""></a>), and
it works well on redhat.

There is no official centos oval, and using redhat oval on centos got
false results.
centos is based redhat, so I wrote a script fetch redhat oval files and
convert it to useful for centos.

And I push the oval to my github: <a href="" title=""></a>

Everyone interested in this can try to use it and tell me it works
correctly or not.

nextcloud-client currently not installable from EPEL in CentOS7

Dear all,

after enabling the EPEL repository,

[root@localhost ~]# yum install nextcloud-client

in a freshly installed and updated CentOS 7.6 machine gives

Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base:
* epel:
* extras:
* updates:
Resolving Dependencies
--> Running transaction check
---> Package nextcloud-client.x86_64 0:2.3.3-1.el7 will be installed
--> Processing Dependency: nextcloud-client-libs(x86-64) = 2.3.3-1.el7
for package: nextcloud-client-2.3.3-1.

CentOS 7.6.1810 CR Available in CBS

Hi Folks,

The CR (<a href="" title=""></a>)
repository was released last week.

Mailbox for Sysadmin

Good day Administrator,
Every self-respecting Admin should have a mailbox in worthy domain. Do
you have it already? If no - go to <a href="" title=""></a> choose one and
start new life

If you aren't interested accept apology for spam.

clamd / amavisd missing socket

I think something along these lines appeared before
but I was unable to find them.

I'm on a 7.6 system, been running clamav and amavisd-new
since 6 days with little problem. On a recent reboot,
clamd@amavisd does not start up and fails manual start.

The problem seems to be the missing socket that connects
the pair, "/var/run/clamd.amavisd/clamd.socket".

I believe this should be created by systemd files but I
see no indication of them on my system.

Anyone know which files might be missing and where to
get copies?

NFS Server on Centos 7.6.1810 dying without reason

Good morning,
in order to post proper documentation, what logs (or log level) do I
need to troubleshoot a Centos 7.6.1810 3.10.0-957.27.2.el7.x86_64 tha
tis running a NFS server on top LVM on top of XFS on top of VDO on top
of MDAM on a 6 SSD disk RAID6 ?

This physical NFS server is servign 2 NFS v4.2 shares to 2 physical
KVM virtualization hosts.

When remote NFS clients start doing intensive stuff (massive writes) ,
the NFS server crashes and sometimes make the Linux server reboot.

form KVM side this is all I get: hvm002 kernel: nfs: server
not responding, timed out


CentOS CR Released with 7.7.1908 Packages

You guys may have noticed that the 7.7.1908 packages for the GA release
have been posted to QA for all arches (x86_64, ppc64le, aarch64. ppc64,
armhfp, i386).

These are just the items that will be in the os/ (base) repository and
not the zero day updates.  We are working on the updates now.

Announcements here:
<a href="" title=""></a>

Johnny Hughes

Ran across this process to upgrade from C6 to C7, will it work???

I figure it won't. Hope the experts can clarify.

I'm still using C6 and want to C7 and really to C8.

<a href="" title=""></a>

I broke "yum update" - C7

This evening I decided to do some work on my development C7 system. As I have not touched it for a while, and wanted to install new services I thought I'd better yum update first.

I saw that it only did updates from Google and PHP, and none from the system repo's so I had a closer look.


I used to be able to 'repair' ext4 fs issue (when the boot process drops
you into emergency mode)...

but now with xfs - it does not seem to let me do that.

xfs_repair /dev/sda3
xfs_repair -L /dev/sda3
both say fatal error
fatal error -- couldn’t initialize XFS library

How can I repair XFS with burning a DVD and finding an external USB reader



C7.6 Update problem

Hi list,
today I tried to update my centos workstation (7.6.1810).
My problem concerns kmod-nvidia update.

Why is the branch c6 empty for every rpm packages?


I wan't to find the sqlite & python rpm packaging files in,
but I found that the branch c6 for centos 6 are all empty.

Is that because centos 6 reached its end? Or where can I find the packaging

Best regards,


Extend DHCP range

I have a simple DHCP range .

option routers;

subnet netmask {

So I want to add a range ->
so I did this:

subnet netmask {

then tried to restart the dhcpd server...

Slideshow/presentation software for CentOS

I am looking for software to make slideshows/presentations on CentOS, incorporating photos, videos and text (possibly also music) allowing for transition effects etc. I'd like to be able to drag and drop/rearrange photos etc. from different folders into a timeline and eventually end up with something I can show. Ideally without having to make copies of photos and store them in a folder specific for this but drag and drop from whatever folder the photo etc.

Reasoning behind RHEL8 packages without corresponding -devel?

(Of course, we should be asking RH... but nevertheless)

EPEL 8 has several issues regarding packages without corresponding
-devel. E.g., libXvMC, libbluray. I see that this causes grief for
EPEL 8 and collateral damage to RPMFusion.

Did RH disclose the reason for this?

kmod-nvidia-430.40-1.el7_6.elrepo.x86_64 fails to install


On August 2, my desktop unit updated with kmod-nvidia-430.40-1.el7_6.elrepo.x86_64nnn
which broke yum having a multiple of dependencies not being present. I uninstall kmod-
dvidia with the hopes that a fresh install would fix the provlem, but it did not.

nvidia-detect returns :

An Intel display controller was also detected

I was hoping that this was a repository problem that would become fixed, but I am still now
unable to reinstall kmod-nvidia.

Has anyone else had this problem, and does anyone have any suggestions as to how I might
begin a fix.

CentOS 8 will be released soon?

Good afternoon from Singapore,

According to the CentOS 8 build timeline, everything has been completed except release work. Does this mean CentOS 8 will be released soon?

<a href="" title=""></a>

The Gospel for all Targeted Individuals (TIs):

[The New York Times] Microwave Weapons Are Prime Suspect in Ills of
U.S. Embassy Workers

Link: <a href="" title=""></a>


Singaporean Mr.

CentOS oVirt Guest Image test report

<a href="" title=""></a>
and seems overall functional.
The ovirt-guest-agent service is disabled. Pushed
<a href="" title=""></a> for fixing it,
please review / merge.
I think we can limit the release to the qcow2c image only.

What is "Release Work"? (CentOS 8)


Everything in the task list shows "done". Yay! Except the last item,
"Release work", which isn't in the Definitions at the end.

Does this mean it just needs to be rolled up into an installation ISO?

I see activity in Koji but I don't know what it means:


(I don't intend this to be nagging. I just seek help in reading the runes.)



I've posted this on cups forum several days ago but did not receive any suggestion. May be Centos Users/admins could give me some advices.

I've setup my first cups server to provide printing services to several clients (instead of each CentOS client reaching the printer).

It is a dedicated VM running CentOS7.

On the web interface all requests belong to Withheld user and it is difficult to know who is printing and who can cancel his request.

Is there some documentation/tutorial to instruct cups to use a remote ldap server to identify users?

CentOS 5 file system read only issue

Hello Everyone,

We are using CentOS 5 system for certain application. Those are VM guests
running in VMware. There is datastore issue occasionally, causing all file
systems becoming read only file systems. So application stop working, and
opened files cannot be written either. We cannot even ssh login to the
system. Typically we had to power cycle the VM. We are trying to add
reliability to the application so that if files cannot be written,
application should time out. We are trying to use IO::Select to handle

CentOS Amazon Machine Image?

I am totally new to AWS.  There was a posting here ~ a year ago making
claims about setting up a CentOS image on AWS.

I have created a free AWS account and am looking at the available images.

None are named CentOS.  There is a Redhat Enterprise Linux 8 and
Amazon's own Linux and SUSE, Ubuntu, but I don't find CentOS.

This is a learning endeavor.  I was thinking to first set up a BIND
slave for my domain.  Then move on to a http image, then work with
MariaDB.  All to see what I can do with AWS that is familiar to what I
do on my own servers.

Any pointers greatly appreciated.

OT: mostly gone

Hi, folks,

Well, it's ten years that I've been on this list, right when I started
this job. But, it's time to move on... I'm retiring. (Yeah, that old.)
So, though I'll be part time for a few months, and running CentOS at
home (in spite of my manager's pushing me to do Ubuntu). This list is
*so* much more useful than any of the ones I've seen for Ubuntu, or
much else.

I'm very much looking forward to C 8.

One more thing: I know I've been over the top on ethics "I work for a
US federal contractor, but not saying more", even though there's folks
like Todd, who's military.

CUPS job handling


is it somehow possible to make CUPS automatically redirect jobs, and
following jobs, away from printers which can not print them to other
printers that can print them until the printers that couldn't print
them are again able to print them?

Like I have a bunch of label printers which are all the same, and all
of which are prone to run out of labels or out of ribbon every now and
then. It can take hours or even days before someone can refill a

Maintenance window for UI of

We are facing some issues with UI for
We are working on it to get it back properly.

Image pull from are working normal.

Impact: GUI for is unavailable.

We will update on resolution, sorry for the inconvenience caused.

Bamacharan Kundu

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